Automatic station selector fob



Sep t. 12,1939. 7 E. H. PITNEY 2,172,623

' AUTOMATIC STATION SELECTOR FOR RADIO RECEIVERS Filed Oct. 4, 193'? sSheets-Sheet 1 awe/rm Earl H. 'Pitrwy E. H. PlTNEY 2,172,623

AUTOMATIC STATION SELECTOR FOR RADIO RECEIVERS Sept. 12, 1939.

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AUTOMATIC STATION SELECTQR FOR RADIO RECEIVERS Filed 06%.. 4, 1957. 3Sheets-Sheet 5 Patented Sept. 12, 1939 AUTOMATIC STATION SELECTOR- FORRADIO RECEIVERS Earl Hume Pitney, Willmar, Minn., assignor of one-fourthto William K. Berger, and onefourth to R. H. Fryberger, both ofMinneapolis,

Minn.

Application October 4,

15 Claims.

My invention relates to automatic station selectors for radio receiversand has for an object to provide a device of such a character wherebyprograms may be selected and arranged throughout twenty four hours a dayfor an entire week and automatically tuned in on the radio at theappropriate times.

Another object of the invention resides in providing a station selectorin which the entire mechanism is reset at the end of the week so thatthe same arrangement of programs is presented each week.

Still another object of the invention resides in providing a devicewhich is extremely simple and practical in construction and will notreadily get out of order.

A further object of the invention resides in providing a device whichcan be used manually in the customary manner without interfering 20 withthe program arrangement or which can be set for a certain station andcaused to operate continuously at such setting without interfering withthe program arrangement.

Another object of the invention resides in providing a device by meansof which sharp tuning of the radio receiver can be procured.

Other objects of the invention reside in the novel combination andarrangement of parts and in the details of construction hereinafterillus- LH trated and/or described.

In the drawings:

Fig. l is a plan sectional view of a portion of a radio receiver and anautomatic station selector illustrating an embodiment of my invention.

:11 I Fig. 2 is an elevational sectional view taken on line 22 of Fig.1.

Fig. 3 is an elevational sectional view taken on line 3-3 of Fig. 1.

Fig. 4 is an elevational sectional view taken 2 on line 44 of Fig. 1.

Fig. 5 is a fragmentary view similar to Fig. 4 showing a differentarrangement of pegs.

My invention may be used in conjunction with any type of radio receiver.For this reason the 4 radio proper has not been shown in detail in thisapplication and only so much thereof as pertains to the presentinvention has been illustrated.

The radio receiver which I have shown in conso junction with my improvedautomatic station selector comprises a cabinet I having a base H, afront panel [2 and other walls l2a and l2b. Extending through the panel[2 is a shaft l3 to which is attached upon the exterior of the panel aknob l4. Knob I4 is used for manually tuning 1937, Serial No. 167,182

the radio receiver in the customary manner. The shaft 13 has mountedupon it a sleeve l which has secured to it condenser plates indicateddiagrammatically at l6. These plates constitute the tuning element ofthe radio receiver and cooperate with other stationary plates in a wellknown manner. The shaft further has mounted upon it a sleeve I1 whichmay rotate relative thereto. The sleeve I5 is rotatably supported in abearing 18 which is mounted on a standard I9 secured to the base ll.Collars 2| secured to the sleeve 15 and engaging the bearing l8 restrainlongitudinal movement of the sleeve IS with reference to the saidbearing. The sleeve I1 is similarly journaled in a bearing 22 which isformed on a standard 23 secured to base ll. Sleeve I1 is similarly heldfrom endwise movement relative to the bearing 22 by means of collars 24.

For procuring timed operation of the invention, an electric clock 25,illustrated in Figs. 1 and 2, is employed. This clock may be of anysuitable type and is constructed with a case 26 in which the electricmotor and reduction gearing are contained. The clock further includes anhour hand shaft 21 which projects outwardly therefrom and which isjournaled in a bearing 28. Bearing 28 is mounted on a standard 29secured to base H. The shaft 21 is held from endwise movement relativeto the bearing 28 by means of collars 3|. The clock 25 also includesanother shaft 32 which travels at a reduced rate of speed but at aconsiderably greater rate of speed than the hour hand shaft 21. Thisshaft is used for procuring power for operating the station findingmechanism of the invention as will be hereinafter more fully described.

The invention, for the purpose of selecting stations, utilizes a drum 33which is supported for rotation and axial movement and driven by shaft21 in the following manner. Attached to the base I0 is an upright 34which carries a support 35 in the form of a bearing and which rotatablyreceives the end of a stationary spindle 36. Spindle 36 may be rotatedwithin said support 35 by means of. a hand wheel 31 secured to the endof the same. A set screw 38 threaded into the support 35 holds thespindle 36 in fixed position relative thereto. The spindle 36, is, atall times, disposed in axial alignment with the shaft 21. Slidably androtatably mounted on the spindle 36 is a sleeve 39. This sleeve isslidably received within another sleeve 4|. Sleeve 4| is constructedwith a longitudinally extending slot 42 in which is disposed a key 43which is threaded and screwed into sleeve 39. This key efiects a drivefor the sleeve 39 from the sleeve 4! and at the same time permits ofaxial movement of the sleeve 39 with reference to the sleeve M. The drum33 is constructed with an end wall 44 which is formed with an outwardlyextending flange 95 to which said drum is attached. The end wall 44 isfurther constructed with an inwardly extending boss 49 in which thesleeve 39 extends. Sleeve 39 is securely mounted within the boss 49 andis attached thereto either by a force fit or in any other suitablemanner so that rotation of sleeve 39 procures rotation of the drum 33.The sleeve 4! is attached to a head 47 which in turn is secured to theend of shaft 27. Rotation of shaft 21 procures rotation of sleeve 4i andat the same time sleeve 39 and drum 33 are rotated through the key 43acting in slot 42. It will be readily comprehended that as drum 33rotates, the same may also move axially.

The spindle 39 is constructed with spiralling threads 98 which extendsubstantially throughout the length thereof. A pin 49 slidably mountedin a bore formed in the sleeve 39 and hub 45 of end wall 44 is adaptedto engage the threads 43 and to follow along the same as the drum 33rotates. By means of this construction the drum is caused to advancealong the spindle 36 as said drum is rotated by clock 25. The pin 49 ispivotally secured to a bell crank 52 which is pivoted to a lug 53issuing from a collar 54 fast on the hub 45. This bell crank has pivotedto it a link 55 which is guided for movement in a guide 53 issuing fromanother collar 5'! which in turn is secured to the sleeve 4|. A longtension coil spring i5! is attached to the pivot 58 between the pin 49and bell crank 52 and is further attached to a finger 59 extendingoutwardly from the sleeve 4!. The link 55 has formed on it at its innerend a collar BI and at its outer end a similar collar 32. These collarsare adapted to alternately engage the guide 59 and as axial movement ofthe drum 33 continues after engagement of either of these collars withsaid guide the bell crank 52 is swung in one direction or the other towithdraw the pin 49 from engagement with the threads 48 or to move thesame into engagement therewith. The pivot 58 to which spring 51 isattached is so disposed that the same swings past the center of thepivot of hell crank 52 whereby the spring serves to hold the pin 49positively in either engaged or disengaged position. The spring I51, inaddition to operating the bell crank 52, returns the drum 33 to normalposition after the pin 49 has been disengaged by means of the collar 62.When such action occurs, the drum is rapidly returned and to preventinjury to the apparatus a buffer spring 63 is employed which is disposedwithin the sleeve 4! and which acts between the end. of the sleeve 39and the head 41. As the drum 33 is rotated the same is advanced alongthe spindle until the same becomes disengaged through the action of thecollar 62 cooperating with the guide 56. This disengages pin 49 andspring 5? immediately returns the drum to normal position. As the drumapproaches normal position collar 3! engages guide 56 and again bringsthe pin 49 into engagement with the threads 48. Drum 33 then continuesto operate as previously described.

The drum 33 is employed for the purpose of starting and stopping theradio receiver at the desired times and in accordance with any desiredprogram arrangement. Toward this end a plurality of radial holes areemployed which are arranged in the surface of drum 33 as shown inFig. 1. These holes are disposed helically with reference to the drum.The invention may be used to operate the radio receiver in conjunctionwith any desired number of stations but in order to simplify thedrawings the present invention has been shown as capable of use inconjunction with two stations which for the purpose of illustration willbe referred to as stations A and B. The holes referred to are arrangedin two groups and are indicated as 64 and 35, the holes 64 controllingthe operation of the radio receiver when tuned in on station A, and theholes 65 controlling the operation of the radio receiver when tuned inon station B. These holes are spaced circumferentially a distancecorresponding to 15 minute intervals so that the programs of the radioreceiver may be changed at 15 minute intervals if desired. The holes 64and 65 are arranged in zones such as designated by reference numerals 96which are defined by spiralling lines 91 formed on the exterior of thedrum. Also the zones 68 are divided up into sections indicating nightand day and suitable indicia placed along the marginal periphery of thedrum to indicate the various times of the day. Cooperating with theholes 64 and 65 are a number of pegs 68 which may be manually insertedinto the same. These pegs are slightly tapered and form a tight fit inthe holes and are thus held in position.

The pegs 68 on drum 33 are adapted to operate two levers H and 12. Thesepegs serve as actuating members and said pegs and levers form parts ofactuating devices for procuring operation of the invention. These leversare both pivoted on a pintle 13 which is mounted on a standard 69secured to base ll. Levers H and 12 are identical in construction andare constructed with arms 14 arranged in proximity to the drum 33. Thesearms are formed with fingers i5 adapted to be engaged by the peg 69whereby the levers are swung on the pintle I3. Levers H and 12 arefurther constructed with arms 16 which extend in the opposite directionfrom the arms 14 and toward the sleeve l1. These arms have fingers 11 atthe outer ends thereof which serve a purpose to be presently more fullydescribed. Fingers 15 are normally maintained in engagement with thesurface of the drum 33 by means of tension coil springs 18 which aresecured at one end to the arms 14 and the other ends to a pin I9extending outwardly from the standard 69.

Mounted on the sleeve I! are two stops BI and 82 which are securedthereto by means of set screws 83. Adjacent the stop 8| is a brake drum36 which is provided with a set screw 81 by means of which the same maybe properly secured to the sleeve. The stops BI and 82 are adapted to beengaged by the fingers 11 of levers H and 12 and when so engagedterminate rotation of the sleeve H. The sleeve I7 is provided at its endwith a pulley 81 by means of which the same may be rotated. Secured tothe end of shaft i3 is a clutch disk 88 which is provided with a clutchpin 89 adapted to engage a socket ill in the pulley 81. When shaft [3 ispulled outwardly through knob l4, pin 89 is brought into engagement withsocket 9| and effects a drive between the pulley 81' and shaft l3.Issuing outwardly from shaft [3 is a pin 92 which may slide axially in aslot 93 formed in sleeve l5. This pin forms a drive between shaft [3 andthe condenser plates I6 whereby tuning of the radio receiver may beprocured. Slot 93 at the same time permits engagement or disengagementof clutch pin 89 with the socket 9|. For the purpose of holding theclutch pin 89 into or out of engagement with the socket 9|, theperipheral edge of the disc 89 is constructed V-shaped as indicated at94. This edge is adapted to engage two or more spring clips 95 attachedto pulley 81 which serve to hold the disk in either of its two extremepositions.

The sleeve I1 is driven in the following manner. Formed in the standardsI9 and 23 are bores 95 and 91 which serve as bearings for a countershaft98. Collars 99 attached to the shaft 98 and disposed adjacent thebearings 96 and 91 restrain longitudinal movement of the shaft withinits bearings. The shaft 98 has attached to it at one end a pulley IN. Abelt I02 passes over this pulley and over another pulley I03 secured toshaft 32 of clock 25. By means or this construction the countershaft 98is driven. Shaft 98 has secured to the other end thereof another pulleyI02a. A belt I03 passes over this pulley and the pulley 81 on sleeve I1.This belt eiTects a drive for the sleeve I1 from the countershaft 98.One of the belts I02 or I03 is sufficiently loose so that when therotation of the sleeve I1 is arrested this belt slips and does not stopthe clock 25.

Operating in conjunction with the brake drum 86 is a brake shoe I04 bestshown in Fig. 4. This shoe is attached to a lever I05 which is pivotedon a pintle I08 secured to a bracket I01 extending outwardly from thestandard 23. Lever I05 is provided at its extreme end with a pin I08which is adapted to be engaged by either of the arms 15 of levers H and12. When either of these levers is in the position of lever II in Fig. 4the brake shoe I04 is free from the brake drum 86 and sleeve I1 mayrotate freely. The lever I is normally urged toward the lever H and 12by a tension coil spring I09 which is attached at one end to the bracketI01 and its other end to an arm III formed on lever I05. This springalso urges the shoe I04 into engagement with the brake drum 86 andarrests movement of the sleeve I1 when lever I05 is not depressed byeither lever H or 12.

The operation of the invention is as follows. In the adjustment of thedevice the two stops BI and 82 are positioned so that movement of theshaft I3 is terminated when the condenser plates I5 are at the properposition to tune in the stations desired. Adjustment of these stops isprocured by loosening set screws 83 and tightening the same after theproper positions are found. Pegs 88 are now inserted in the proper holes5 and 65 to procure operation of the radio receiver at the desiredtimes. Normally the clock 25 is running and one of the belts I02 or I03slipping and the sleeve I1 stationary. As the drum 93 rotates the firstpeg opposite the fingers 15 of lever H and 12 will engage said fingerand depress the finger 11. As soon as this finger commences to move pinI08 is depressed which releases the brake shoe I04. This frees the brakedrum 85 and sleeve I1 and shaft I3 commences to rotate. As soon asfinger 11 is sufficiently dep ssed the same comes into engagement withthe particular stop 8! or 82 with which it cooperates and the sleeve I1and shaft 23 are arrested. This is the position in which the radioreceiver is tuned for the desired station. Due to the adjustment of thestops BI and 82 and to the mechanism for arresting movement thereofsharp tuning of the radio receiver can be procured. Furthermore oncethese stops have been set, the radio condenser can be repeatedly stoppedaccurately at the same places so that repeated operation can be procuredwithout variation.

Attached to standard 69 is an electric switch l I2 which is normallyopen and which is adapted to be closed by either of two fingers II 3 oneon each of the levers H and 12. This switch is connected in the radiocircuit and serves to start and stop the radio receiver. When either ofthe levers H and 12 are depressed and engages the corresponding stop 8|and 82 the switch H2 is closed and the radio receiver operates. Each ofthe pegs 68 is of a circumferential extent great enough to cause theradio receiver to operate for I5 minutes. If the radio receiver is tooperate continuously it becomes necessary to arrange a number of pegs 68in succession which maintain the finger 15 elevated and the sleeve I1arrested. As soon as the finger 15 reaches the last peg 68 thecorresponding lever is moved by its spring 18 to disengage finger 11from stop 8I or 82 and free the sleeve I1. This also sets brake I 05which stops the drum 85. One of the belts I02 or I03 again slips and theclock continues to operate until one or the other of two levers H or 12is released by additional pegs 68 attached to the drum 33. It willreadily be comprehended that programs may be arranged in advance forevery hour of the day and for every day of the week so that once thedevice is set it will repeat itself every week. This is possible byreason of the fact that the drum 33 makes I4 revolutions before the sameis returned, each revolution representing 12 hours.

To permit of selectively tuning the radio receiver to either of stationsA or B and operating the same independently of the drum 33 and withoutinterfering with the program arrangement procured by the pegs on drum. amechanism is employed which is bet shown in Fig. 2. Attached to thepanel !2 of case if? is an escutcheon plate SM. To this plate is securedtwo flexible tubes H5 and H6 which are also secured to an ear t9 formedon upright 69. Within these tubes are spring steel wires l2I which haveattached to their outer end knobs H1 and H8 by means of which the samemay he slid longitudinally along the tubes H5 and H5. The other ends ofthe Wires i2! have secured to them buttons I22 which are adapted toengage the levers "II and 12 and to depress the same. It will readily becomprehended that the shaft I3 may be held from movement by forcing theknobs I I1 and 8 inwarcl'y which holds the fingers 'i'! of either of thelevers 1! or '52 in engagement with its corresponding stcp 8! or 82.This closes the regular radio switch causes the radio receiver toperform without interrupti n or change of station. When so operated theradio receiver is no longer shut off at the end of each chosen butcontinues to operate with the station selected through knobs Ill and H8regardless of the setting of the pegs on drum it is desired to operatethe radio receiver mar ly and without interfering with theproarrangement, this may be accomplished by forcing the knob M inwardlyas shewn in 3. Shaft i3 is then disengaged from sleeve and may bemanually rotated.

The advantages of my invention are manifest. An extremely simple andpractical construction is provided whereby radio programs may bearranged a week in advance and the radio receiver be automaticallystarted and tuned in at the proper times. The device permits of tuningthe radio receiver to any station without interfering with thearrangement of the programs. With my invention the radio receiver can bemanually operated in the customary manner without interfering with theprogram arrangement. At the end of the week the entire device becomesautomatically reset and the performance is repeated each succeedingweek. Pegs may be positioned while the drum is disposed within the radioreceiver to permit of program arrangement. The device is positive inaction and will not readily get out of order.

Changes in the specific form of my invention, as herein disclosed, maybe made within the scope of what is claimed without departing from thespirit of my invention.

Having described my invention, what I claim as new and desire to protectby Letters Patent is:

1. In combination with the tuning element of a radio receiver, achronometrically rotated shaft, a second shaft splined relative to saidfirst shaft and rotatable therewith, a drum carried by said secondshaft, a fixed screw cooperating with said second shaft to move saiddrum axially upon rotation thereof and means controlled by said drum foroperating said tuning element.

2. In combination, a chronometrically rotated shaft, a second shaftsplined relative to said first shaft and rotatable therewith, a drumcarried by said second shaft, a fixed screw, a member carried by saiddrum and movable to engage or disengage the threads of said screw formoving the drum longitudinally upon rotation of said second named shaft,means for engaging said movable member when the drum is at one positionrelative to the screw and means for disengaging the movable member whenthe drum is at another position relative to the screw.

3. In combination, a chronometrically rotated shaft, a second shaftsplined relative to said first shaft and rotatable therewith, a drumcarried by said second shaft, a fixed screw, a movable member carried bysaid drum and adapted to engage or disengage the threads of said screwand adapted to advance said drum along said screw in one direction,means for bringing said movable member into engagement with the screw atthe one extreme position of said drum, means for disengaging said movabemember from said screw at the other extreme position of said drum and aresilient member for returning said drum to its first named position.

l. In combination, a chronometrically rotated shaft, a second shaftsplined relative to said first shaft and rotatable therewith, a drumcarried by said second shaft, a fixed screw, a movable member carried bysaid drum and adapted to engage or disengage the threads of said screwand adapted to advance said drum along said screw in one direction, abell crank to which said member is pivoted, means for pivoting said bellcrank to said drum, a link connected to said beli crank and extendinglongitudinally within said drum, a guide carried by said rotatable shaftalong which said link travels and shoulders on said link adapted toengage said guide to move said bell crank in opposite directions toeffect engagement and disengagement of said movable member with saidscrew.

5. In combination, a chronometrically rotated shaft, a second shaftsplined relative to said first shaft and rotatable therewith, a drumcarried by said second shaft, a support, a screw mounted for rotaryadjustment in said support and concentrically arranged with respect tosaid second named shaft, means for normally holding said screw fromadjustive rotation with reference to said support, and means carried bysaid drum for engagement with said screw to procure movement of saiddrum longitudinally of said screw responsive to rotation of said drum.

6. In combination, a chronometrically rotated tubular shaft having alongitudinally extending slot therein, a tubular shaft within said firstnamed shaft, a spline attached to said second named tubular shaft andslidable along said slot, a drum secured to said second named tubularshaft, a fixed screw disposed within said second named tubular shaft,and means carried by said drum for engagement with the threads of saidscrew.

'7. In combination, a revoluble member for rotating the tuning shaft ofa radio receiver, yieldable means tending to rotate said member, a stopon said member, a lever having a finger adapted to engage said stop, achronometrically rotated drum, means on said drum for moving said leverto bring said finger into engagement with said stop and brake meansoperated by said lever for arresting the movement of said revolublemember when said finger is disengaged from said stop.

8. In combination, a revoluble member for rotating the tuning shaft of aradio receiver, yieldable means for tending to rotate said member, astop on said member, a lever having a finger adapted to engage saidstop, a chronometrically rotated drum, means on said drum for movingsaid lever to bring said finger into engagement with said stop, a brakedrum rotatable with said revoluble member, a pivoted brake shoe adaptedto engage said brake drum to arrest movement of said revoluble memberand means operated by said lever for disengaging said brake shoe uponmovement of said finger toward said stop.

9. In combination, a fixed elongated screw, a drum rotatably andlongitudinally slidably mounted on said screw, an element carried bysaid drum and shiftable into and out of engagement with the threads ofsaid screw, means for maintaining said drum in rotative movement, meansfor shifting said element into and out of engagement with said screw atrespective extreme longitudinally shifted positions of said drum on saidscrew, and means yieldably urging said drum toward the first of saidrespective positions thereof.

10. In combination, a chronometrically rotated shaft, a longitudinallymovable rotatable drum rotated by said shaft, a screw, releasable threadengaging means adapted to engage the threads of said screw for movingsaid drum longitudinally in one direction upon rotation thereof, meansoperable to release said thread engaging means when the drum reaches apredetermined position in its coiuse of longitudinal movement, said drumwhen said thread engaging means is released being longitudinallyslidable relative to said screw for return to an initial position.

11. In combination, a fixed elongated screw, a drum rotatably andlongitudinally slidably mounted on said screw, an element carried bysaid drum and shiftable into and out of engage-- ment with the threadsof said screw, means for maintaining said drum in rotative motion, anelongated member carried within said drum for movement longitudinallythereof, means connecting said member to said shiftable element to causeshifting of said element into and out of engagement with said screwresponsive to movement of said member in respective directions relativeto said drum, stop means on said member, and stop means immovablelongitudinally of said drum for cooperation with said firstmentionedstop means to cause shifting of said element into and out of engagementwith said screw at the respective extreme longitudinally shiftedpositions of said drum on said screw.

12. In combination with a radio receiver, a tubular tuning shaft, meansfor journaling said shaft and restraining axial movement thereof, arevoluble member co-axially mounted for rotation with respect to saidtuning shaft, means for rotating said revoluble member, an operatingshaft extending through said tubular tuning shaft and having axialmovement with reference thereto, a spline between said operating shaftand said tuning shaft, a clutch between said revoluble member andoperating shaft, means on the end of said operating shaft opposite tosaid revoluble member and disposed outwardly of said tuning shaft forshifting said operating shaft axially to connect or disconnect saidoperating shaft and said revoluble member.

13. In combination, a drum, means for imparting to said drumsimultaneous rotative and longitudinal motions, a plurality ofrespective helically extending parallel series of actuating elementscarried on the peripheral surface of said drum in such interposedrelation with each other as to form a multiple helix the pitch of whichis equal to the longitudinal distance traversed by said drum perrevolution thereof, a plurality of members associated with and adaptedto be operated by the actuating elements of the respective seriesthereof, and stationary means by which said members are supported.

14. In combination, a drum, means for imparting tosaid drum simultaneousrotative and longitudinal motions thereof, two series of actuatingelements disposed on the peripheral sur face of said drum alongrespective helical lines each having a pitch equal to the longitudinaldistance traversed by said drum per revolution thereof, each of saidactuating elements being individually removably attached to said drum, apair of members shiftable toward and away from said drum and continuallyyieldingly pressed toward the same at said respective helical lineswhereby an actuating element on said drum engaging one of said memberswill deflect the same outwardly of said drum, the dimensions of each ofsaid members and of each of said actuating elements circumferentially ofsaid drum being such that one of said members engaged by one of saidactuating elements will be held in deflected position throughout apredetermined period of time and then released by said actuating elementand an actuating element then coming into actuating relation with theother of said members will deflect the same substantially in unison withrelease of said first member.

15. In combination with a radio receiver, a tubular, adjustivelyrotatable tuning shaft for said radio receiver, means for journallingsaid shaft and restraining the same from axial movement, an operatingshaft extending into the interior of said tubular shaft and splinedthereto, a revoluble member mounted on said operating shaft androtatable thereon, a rotating member for driving said revoluble member,and a clutch for connecting said operating shaft to said revolublemember operative responsive to longitudinal shifting of said operatingshaft, and a manual operating element on said operating shaftmanipulatable for rotating said shaft and shifting the samelongitudinally.

EARL HUME PITNEY.

